US4053868A - Vehicle system monitor - Google Patents

Vehicle system monitor Download PDF

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Publication number
US4053868A
US4053868A US05/754,816 US75481676A US4053868A US 4053868 A US4053868 A US 4053868A US 75481676 A US75481676 A US 75481676A US 4053868 A US4053868 A US 4053868A
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US
United States
Prior art keywords
panel
indicators
test switch
vehicle
condition
Prior art date
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Expired - Lifetime
Application number
US05/754,816
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English (en)
Inventor
Harrison F. Cox
Thomas E. Cochran
Lawrence F. Fratzke
Joe E. Fuzzell
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Caterpillar Inc
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Caterpillar Tractor Co
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Filing date
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Priority to US05/754,816 priority Critical patent/US4053868A/en
Application filed by Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Priority to GB31789/77A priority patent/GB1537962A/en
Priority to CA286,502A priority patent/CA1101511A/en
Priority to FR7730280A priority patent/FR2375072A1/fr
Publication of US4053868A publication Critical patent/US4053868A/en
Application granted granted Critical
Priority to BE182892A priority patent/BE861151A/xx
Priority to JP14336477A priority patent/JPS5383236A/ja
Priority to BR7708606A priority patent/BR7708606A/pt
Priority to JP59155716A priority patent/JPS6064047A/ja
Assigned to CATERPILLAR INC., A CORP. OF DE. reassignment CATERPILLAR INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CATERPILLAR TRACTOR CO., A CORP. OF CALIF.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/006—Indicating maintenance
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
    • G07C5/0816—Indicating performance data, e.g. occurrence of a malfunction
    • G07C5/0825—Indicating performance data, e.g. occurrence of a malfunction using optical means

Definitions

  • This invention relates to motorized vehicles and more particularly to a monitor system which indicates the presence of undesirable conditions in the engine or other vehicle components.
  • instruments are employed to detect the presence of various undesirable operating conditions such as overheating of the engine, low oil pressure, low fuel and the like, and indicators are provided to give warning to the vehicle operator of such condition.
  • similar instruments and indicators are provided to indicate operating faults distinct from the engine.
  • instruments may be present to indicate a low level of hydraulic fluid in the supply reservoir, an overheating of the hydraulic fluid, a clogging of the hydraulic fluid filter and so on.
  • the importance of the various monitored conditions varies, both as to criticality and as to time in relation to the operation of the vehicle.
  • the levels of the various fluids such as engine oil, transmission fluid, hydraulic fluid and coolant fluid should be checked and deficiencies corrected prior to start-up of the vehicle.
  • Operating conditions such as brake pressure, coolant temperature, fuel level, whether the parking brake is on and the like should be monitored prior to and during the time the vehicle is in operation.
  • Some operating conditions are more critical than others, insofar as the need for immediate action on the part of the operator is required.
  • the existence of a low alternator output would be an example of a relatively noncritical condition. The operator should be warned of such condition, but no immediate corrective action would be needed.
  • a loss of brake pressure would require the operator to take immediate steps to prevent damage to the vehicle.
  • Other conditions may arise and be detectable when the vehicle is in operation, such conditions indicating a need for servicing the vehicle when it is returned to the shop.
  • the oil filter may clog during vehicle operation and need cleaning or replacement when the vehicle is through for the day.
  • monitor systems have detected the undesired conditions and then signaled the vehicle operator by means of dial indicators, indicator lamps or audible means.
  • the efficiency of these systems is greatly dependent upon the operator's careful attention to all of the various indicators and upon his judgment as to which may call for immediate correction and which may be deferred.
  • the more complex the vehicle and its auxiliary equipment the greater is the number of operating conditions that should be monitored.
  • the more complex the vehicle the less the time the operator will have to observe the greater number of various indicators since he will be more immediately concerned with direct vehicle operation.
  • the present invention is directed to overcoming one or more of the problems as set forth above.
  • different indicator panels are provided, one for prestart conditions, one for operating conditions and one for service conditions.
  • the prestart-condition panel gives individual warnings to the operator of fluid level deficiencies which should be remedied before the engine is started. This panel does not function during engine operation so that the operator is not distracted thereby.
  • the operating-condition panel gives individual warnings to the operator of faults relating to operation of the vehicle and is energized during such operation.
  • the service-condition panel indicates individual faults which arise during vehicle operation and latches them so that the fault indication will remain after the vehicle is shut down.
  • the service-condition panel may be located remotely from the operator so that he is not distracted thereby during operation of the vehicle.
  • the system discriminates between different operating conditions and provides one type of warning if a noncritical fault exists and another, more imperative, warning if a critical fault exists.
  • a general low-level warning is given to the vehicle operator of the presence of any service-condition fault.
  • all of the indicators of the various panels may be easily tested at any time the panels are energized to see if the indicators are all in working order.
  • a monitor system which presents fault indications of a large number of vehicle conditions in a manner providing least distraction to the operator, least necessity on his part to maintain vigilance over the indicators and least need for his value judgment as to the degree of criticality of the fault.
  • FIG. 1 is a combined block schematic diagram of the monitor system showing location of components on a typical earthmoving vehicle;
  • FIG. 2 is a diagram of the vehicle power supply system and its relation to the panels of the monitor system;
  • FIGS. 3A and 3B are circuit diagrams of the operator panel and the operating-condition-responsive sensors monitored thereby;
  • FIG. 4 is a circuit diagram of the service panel and the service-condition-responsive sensors monitored thereby;
  • FIG. 5 is a circuit diagram of the fluid level panel and the fluid-level-condition-responsive sensors monitored thereby.
  • FIG. 1 illustrates in general the monitor system of the present invention and the location of the various components thereof in a typical earthmoving vehicle, specifically shown herein as a wheel loader 10.
  • the monitor system functions to monitor operating conditions for the engine, transmission, electrical systems and accessory functions and to provide visual and/or audible indications of the existence of a fault.
  • the Fluid Level panel 11 is mounted on the vehicle at the operator location, which in the case of the disclosed vehicle 10 would be the vehicle cab, and groups the indicators for the monitors of the level of coolant, engine oil, transmission oil and hydraulic fluid. The information from this panel is particularly of concern in prestart servicing.
  • the panel 11 is energized from the vehicle battery 12 upon closure of the main and auxiliary disconnect switches 13 and 14. If any of the fluid levels is low, visual indication of such low level is provided to the operator so that the condition can be remedied before the vehicle is put into operation.
  • a dash-mounted test switch 16 is provided in the cab so that the operator can test the indicators to see if they are operable. If the indicators are in fact operable, and no low fluid-level condition exists, the vehicle may be put into operation.
  • a normally closed switch 17 will open when the engine oil pressure builds up and removes the power to the Fluid Level panel.
  • the Operator panel 18 is provided in the vehicle cab and groups the indicators for malfunctions which might occur during operation of the vehicle. If the temperature of the transmission oil or the hydraulic oil becomes excessive, or if the fuel is low or the output of the vehicle alternator 19 (FIG. 2) is low, a low-intensity visual indication of the particular fault will be provided and a master light 21 of greater intensity will flash to attract the attention of the operator to the existence of a fault.
  • the master light 21 will flash and a low-intensity visual indication of the particular fault will be provided.
  • These faults are more critical and any one or more of these faults will also cause the warning horn 22 to sound so that the fault indication cannot be overlooked.
  • the horn is interlocked with the alternator, by means of relay 23 so that the horn will not operate unless the engine is running and the alternator is producing a voltage.
  • the dash-mounted Test switch 16 enables the operator to check at any time during vehicle operation to see if all of the operating-condition indicators are operable.
  • the Service panel 26 is located remotely from the cab and is available primarily for maintenance personnel in servicing the vehicle after it returns from use. This panel monitors the pressure differential across the various filters of the vehicle system, e.g., the engine oil, fuel, air, hydraulic fluid and transmission fluid filters and provides a visual indication for each filter if it is clogged and needs cleaning or replacement.
  • a normally closed coolant temperature switch 27 is provided to disable the indicators until the coolant temperature has risen to above 71° C., in order to prevent spurious fault signals which might occur if the fluids are cold and sluggish.
  • the Service panel is continuously energized from the battery and provides a latched indication of a fault which will exist even though the disconnect switches 13 and 14 are opened and the vehicle is shut down.
  • the Service panel is provided with a Test switch 28 so that the maintenance personnel may verify that all Service indicators are operable and a Reset switch 29 by which the fault indications can be restored after the filters have been serviced.
  • a low-intensity indicator light 30 will be lit on the Fluid Level panel 11 in the vehicle cab so that the vehicle operator will be aware of this fact and can report it to the maintenance personnel on his return.
  • warnings of three different degrees of intensity are given to the vehicle operator during operation of the vehicle. If any service-condition fault arises, the low-intensity light 30 will be energized. If a noncritical operating-condition fault occurs, the high-intensity light 21 will flash on and off. If a critical operating-condition fault exists, the light 21 will flash and in addition the horn 22 will sound.
  • FIG. 2 illustrates the vehicle power supply. Closure of the auxiliary disconnect switch 14 energizes relay coil 31 to close relay contacts 32 so that battery power is supplied to the Operator and Fluid Level panels 18 and 11.
  • the usual starter 33 and glow plugs 34 are provided for the vehicle engine, these being energizable from the battery upon closure of the main disconnect switch 13 and start switch 35.
  • FIGS. 3A and 3B The circuits of the Operator panel 18 are shown in FIGS. 3A and 3B.
  • This panel has terminal 37 connected to the positive terminal of the vehicle alternator 19, terminal 38 connected to the positive side of battery 12 through relay contacts 32, terminal 39 connected to ground and terminal 40 connected to Test switch 16.
  • An inverter oscillator 47 is provided and continuously oscillates at a frequency of about 11 or 12 Hz.
  • the oscillating Q output is applied to one of the inputs of each of NAND gates 51, 52, 53, 54 and 55, while the Q output is applied to one of the inputs of each NAND gates 56, 57, 58 and 59.
  • a multiple of condition-sensing switches 61-66, 68a, 68b and 69 provide inputs to the Operator Panel circuitry shown on FIGS. 3A and 3B.
  • the switches are shown in the state for a condition where disconnect switches 13 and 14 are open, the vehicle engine is shut down and the parking brake is set.
  • Switches 61, 62, 68a, 68b are conventional normally open devices which close when the engine is running and engine oil pressure, coolant flow, brake oil pressure, and brake air pressure are normal.
  • Switch 66 is a conventional Robertshaw electronic fluid level switch that closes when energized by closure of disconnects 13 and 14 if fuel level is proper.
  • Switches 63, 64, 65 are normally closed thermal trip devices that open only when the temperature of the medium in which they are located exceeds a specific value.
  • Switch 69 is a normally closed device that opens when the vehicle parking brake is set. When the vehicle is operational and the Operator Panel circuitry is energized, all sensor switches are closed to ground if the conditions sensed are normal.
  • the engine oil pressure switch 61 is connected through resistor 71 to buss 46.
  • Switch 61 is a conventional, normally open, pressure-actuated switch which is closed when oil pressure is normal but which will open in the event of insufficient oil pressure.
  • the lower end of resistor 71 is connected by resistor 81 to the output input of NAND gate 51.
  • the oil pressure switch 61 is closed, the lower end of resistor 71 is grounded, and this low input to NAND gate 51 will cause its output to be high (and at the potential of bus 46). As a consequence, there will be no voltage differential across the light-emitting diode (LED) 91 and it will not be lit.
  • LED light-emitting diode
  • switches 62-66, 68a, 68b and 69 are connected by resistors 72-76, 78 and 79 to bus 46, and the lower ends of those resistors are connected through resistors 82-86, 88 and 89 to NAND gates 52-56, 58 and 59. Any of the LED's 92-96, 98 and 99 will be energized in response to the opening of a closed switch associated therewith in a manner as set forth above.
  • Resistors 101, 102 and 103 are connected from the positive terminal of the alternator to ground, resistor 102 being adjustable to set the voltage level of junction 104.
  • Junction 104 is connected by diode 106 and resistor 77, to positive bus 46, and the lower end of resistor 77 is connected through inverter 107 to NAND gate 57. If the junction 104 is above the potential on bus 46, diode 106 will be back-biased so that inverter 107 will have a high input and low output. If the voltage at junction 104 drops below bus 46 potential, the anode voltage of diode 106 will likewise drop.
  • the input to inverter 107 will be sufficiently low as to cause the inverter to output a high to NAND gate 57.
  • the gate then outputs a low to energize LED 97 each time the Q voltage from oscillator 47 is high.
  • the LED's 91-99 can be tested by closing the Test switch 16 and grounding the negative test bus 108 connected to terminal 40 of the panel.
  • This bus is connected through diode 109 to the input of inverter 107, so that when the terminal is grounded, the input of inverter 107 goes low causing NAND gate 57 to output a low on each high pulse from oscillator 47 and thereby cause LED 97 to be energized.
  • Resistors 107a and 107b and capacitor 107c delay the application of a high input to gate 57 from inverter 107 to provide for noise suppression.
  • the low test voltage at terminal 40 and bus 108 is also applied to the "test" terminal of the conventional Robertshaw electronic fuel-level switch, which causes its switch 66 to open. Such opening causes LED 96 to be energized as if a low fuel condition existed.
  • the positive terminal of the switch is connected to the positive bus 46 through resistor 110.
  • the test bus 108 is also connected through diode 111 and resistor 112 to the positive bus 46.
  • terminal 40 When terminal 40 is grounded, the anode of diode 111 goes low and inverter 113 will output a high voltage to the positive test bus 114.
  • This high voltage is applied through diode 115 to NAND gate 51, and through corresponding diodes to the other gates 52-55, 58 and 59, to simulate a fault condition and cause the outputs of all of these gates to go low and to thereby energize the LED's associated therewith.
  • Test switch 16 causes all LED's 91-99 to be energized so that the operator can be assured the fault-detecting indicators are in operable condition.
  • the leads from the condition-responsive switches 64, 65 and 66 extend onto FIG. 3B and are applied to the input of NOR gate 116.
  • the output of the low-alternator-voltage NAND gate 57, FIG. 3A is connected by lead 117 to the input of inverter 118, FIG. 3B, the output of inverter 118 being connected through diode 119 to the remaining input of NOR gate 116.
  • gate 116 The monitored conditions applied to gate 116 are regarded as non-critical conditions. Under normal operations, all inputs to NOR gate 116 will be low, and this gate will output a high. If any one of these inputs is high, as will happen if a fault occurs, gate 116 will output a low.
  • the leads from switches 61, 62, 63 and 68a extend to FIG. 3B and are applied to the inputs of NOR gate 121. Normally, all inputs are low and the output of gate 121 will be high.
  • the output of gate 121, inverted by inverter 122, is applied to the input of NOR gate 123, along with the lead from switch 69. If there is a fault in any of these critical conditions, its corresponding input to gate 121 or 123 will go high and the output of gate 123 will go low.
  • the outputs of the noncritical-condition gate 116 and the critical-condition gate 123 are both applied to the inputs of NAND gate 124. With no fault existing, both of the inputs to gate 124 will be high and the output of this gate will be low. Any fault, critical or noncritical, will cause the output of gate 124 to go high.
  • gate 124 is coupled by zener diode 126 and diode 127 to pin 6 of timer 128 which is connected for astable oscillation at a frequency determined by the values of the resistors 129 and 131 and capacitor 132 in its external circuit.
  • a commercially available Signetics SE 555 Monolithic linear intergrated timer circuit may be used for timer 128.
  • diode 127 With no fault conditions existent, and with a low output from NAND gate 124, diode 127 will prevent capacitor 132 from charging to the threshold level of the timer and will thus keep it from oscillating.
  • the timer output, at pin 3, will be high. If a fault condition exists, the output of gate 124 will go high, allowing capacitor 132 to charge sufficiently to start the timer into operation.
  • the values of resistors 129 and 131 are preferably chosen so that when timer 128 does oscillate, its output will be high for 2 seconds and then low for 1 second during a cycle of oscillation.
  • timer 128 The output of timer 128 is coupled by resistor 133 to a transistor 134. With a normally high output from the timer, transistor 134 will be in conduction and transistor 136 will be held off. When a fault exists, transistor 134 will be turned off during the 1-second low output from timer 128 and transistor 136 will be turned on, to complete the power circuit to master light 21.
  • the existence of any fault in a condition monitored by the Operator panel will cause the master light 21 to flash on and off at the rate and for the duration determined by timer 128.
  • the presence of the visual signal from the relatively high-intensity light 21 will alert the operator and he can then inspect the relatively low-intensity LED's 51 through 99 to see what the specific fault is.
  • timer 128 is also connected through resistor 138 to a transistor 139 so that the horn 22, whose operating coil is in series with a transistor 141, may be energized in response to the existence of a critical fault.
  • the output of the critical-condition NOR gate 123 is also coupled by resistor 143 to the base of transistor 139.
  • the normally high output from the critical-condition gate 123 will continue to be applied to the base of transistor 139 to maintain it in conduction even though the output of timer 128 went low in response to the existence of the noncritical fault. Thus, the horn will not be energized for a noncritical fault.
  • relay contacts 146 In order to prevent the horn from sounding when the engine is not running, the power circuit to the horn is completed through normally open relay contacts 146. These contacts are closed when relay coil 147 is energized, which will occur only when the alternator 19 is being driven by the engine.
  • oscillator 151 in the Operator panel is utilized for this purpose.
  • Oscillator 151 is a timer, similar to the timer 128, connected as a free-running astable oscillator and oscillating at a frequency suitable for horn operation.
  • the output of oscillator 151 is inverted by inverter 152 and applied through diode 153 to the base of transistor 139. If the output of inverter 152 is not grounded at terminal 154, as shown in FIG. 3B, then repeated positive pulses will be applied to transistor 139 through diode 153 to repeatedly turn the transistor on during the 1-second periods of time that the output of gate 123 and timer 128 are both low. If the horn 22 does have an internal oscillator, terminal 154 is grounded so that oscillator 151 will have no effect on transistors 139 and 141.
  • the circuits of the Service panel 126 are shown in FIG. 4. This panel has terminal 161 connected directly to the positive side of battery 12, terminal 162 connected directly to the negative side of the battery, and terminal 163 connected to ground.
  • Zener diode 167 provides protection for the regulator against over-voltage conditions of the vehicle electrical system. A regulated positive voltage appears on bus 169, while negative battery voltage appears on bus 170.
  • the condition of the engine oil filter is monitored by means of a pressure-responsive switch 171 which is normally closed and which will open, by conventional means not shown, when the pressure differential across the filter exceeds a predetermined amount -- indicating the existence of a clogged filter which needs cleaning or replacement.
  • This switch is connected through diode 172 to the junction 173 between resistors 174 and 176 which are connected in series with capacitor 177 between the positive and negatave buses 169 and 170.
  • switch 171 When switch 171 is closed, it grounds junction 173 and prevents capacitor 177 from charging.
  • junction 173 is also grounded through diode 172, diode 178 and the engine coolant temperature switch 27. This switch is closed when the coolant temperature is below 71° C. and will prevent any fault detection when the engine and fluids are cold. When the coolant temperature reaches 71° C., switch 27 will open and allow fault detection to occur.
  • junction 173 will be ungrounded, and capacitor 177 can charge through resistors 174 and 176.
  • the voltage across capacitor 177 is applied to the set input of flip-flop 181, and when in due course the voltage has risen sufficiently, a set signal is applied to this flip-flop to cause its Q output to go high. Once set, the Q output will remain latched high until a high signal is applied to the reset input of the flip-flop, even though the set signal may be removed, as by a reclosure of switch 171 or switch 27.
  • flip-flop 181 The high Q output of flip-flop 181 is inverted by inverter 182 and applied to LED 183, causing it to be energized for as long as the Q output of flip-flop 181 remains high.
  • any of the normally closed switches 186, 187, 188 or 189 associated with the fuel, air, hydraulic fluid and transmission fluid filters will enable capacitors 191, 192, 193 or 194 to charge and apply a set voltage to flip-flops 196, 197, 198 or 199 so that the inverted Q outputs thereof will energize LED's 201, 202, 203 or 204, respectively.
  • the Service panel is provided with two output terminals 206 and 207, terminal 206 being connected through resistor 208 to the positive bus 169, and terminal 207 being connected to the inverted outputs of flip-flops 181, 196, 197, 198 and 199 by diodes 209, 211, 212, 213 and 214. Terminals 206 and 207 are connected by leads 216 and 217 to terminals 218 and 219 of the Fluid Level panel 11, and LED 30 of the Fluid Level panel is connected therebetween.
  • the voltage at terminal 207 will go low, energizing the low-intensity LED 30 in the vehicle cab so that the operator there will be apprised that the Service panel has detected a service-condition fault.
  • the Service panel circuits will be energized whether the disconnect switches 13 and 14 are open or closed. As a consequence, once a flip-flop has been set and its associated LED has been energized, the LED will remain lit after the vehicle has been shut down.
  • the positive bus 169 is connected through resistor 222 and diode 223 to ground.
  • the current flow through resistor 222 and diode 223 will maintain the junction 224 therebetween at essentially ground potential, so that the output of inverter 226 is high.
  • the main disconnect switch 13 is opened, the circuit through resistor 222 and diode 223 will be broken, junction 224 will go high and the output of inverter 226 will go low to provide a path to the negative bus 170 through diode 227.
  • junction 173 in the RC circuit for the set input to flip-flop 181 will be low through diodes 172, 178 and 227 and will prevent capacitor 177 from charging when the main disconnect switch is opened.
  • diode 227 will prevent the capacitors for any of the other flip-flops from charging when the main disconnect switch is opened.
  • any energized LED can be extinguished by closing the reset switch 29, which applies the positive voltage on bus 169 to the reset input of all of the flip-flops.
  • the operability of the LED's can be checked at any time by closing the test switch 28.
  • Diodes 231, 232, 233, 234 and 235 will connect the LED's through the test switch to the negative bus 170 and cause them all to be energized. Failure of any LED to light when the test switch is closed will indicate the need for that LED to be replaced.
  • the circuits of the Fluid Level panel 11 are shown in FIG. 5.
  • This panel has a terminal 251 connected to the positive side of battery 12 through the auxiliary disconnect relay contacts 32, and a terminal 252 connected to ground.
  • both disconnect switches 13 and 14 must be closed to provide power to the Fluid Level panel.
  • Power is delivered to voltage regulator 253 through the engine oil pressure switch 17. This switch will open once the engine has been started and the oil pressure has built up, so that the Fluid Level panel is only powered during initial start-up operations.
  • Resistor 254 and zener diode 255 protect the voltage regulator 253 against transient spikes from the vehicle electrical system, and the regulated output from voltage regulator 253 is applied to positive bus 256.
  • Timer 257 is connected for free-running, astable oscillation, resistors 258 and 259 and capacitor 260 being selected so that the timer will oscillate at about 11 or 12 Hz.
  • the oscillating output of the timer is applied to one of the inputs of each of the NAND gates 261, 262, 263 and 264.
  • the signal terminals from the coolant level, engine oil level, transmission oil level and hydraulic oil level switches 271, 272, 273 and 274 are connected to the positive bus 256 by resistors 276, 277, 278 and 279, respectively.
  • the junction of each switch and its associated resistor is connected to the other input of one of the NAND gates 261-264.
  • each NAND gate When all of the switches are closed, as they will be if the fluid levels are proper, each NAND gate will have one of its inputs continuously grounded so that all gates will have a high output, thus preventing any of the LED's 281-284 from being energized. If one of the monitored fluid levels is low, its switch will open. For example, if the engine oil level is low, switch 272 will open, removing the ground connection therethrough.
  • LED 30 in the Fluid Level panel will be energized if a Service Panel fault exists. LED 30 is powered from the Service panel and will continue to be so powered even though the oil pressure switch 17 opens and removes power from the Fluid Level panel.
  • the positive terminals of the fluid level switches are connected to positive bus 256 through resistors 286, 287, 288 and 289, and the test terminals are connected through diodes 291, 292, 293 and 294 to the emitter of transistor 295.
  • the negative side of LED 30 is also connected to the emitter by diode 296.
  • the base of transistor 295 is connected by resistor 297 and diode 298 to terminal 299, which is connected externally to the dash-mounted test switch 16. Closure of the test switch will ground the base of transistor 295, causing it to turn on so that the cathodes of diodes 291-294 and 296 are grounded.
  • LED 30 will be energized.
  • the test terminals of all of the fluid level switches will also be grounded, which opens the switches 271-274 so that LED's 281-284 will also all be energized.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Alarm Systems (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Emergency Alarm Devices (AREA)
  • Motor And Converter Starters (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
US05/754,816 1976-12-27 1976-12-27 Vehicle system monitor Expired - Lifetime US4053868A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US05/754,816 US4053868A (en) 1976-12-27 1976-12-27 Vehicle system monitor
GB31789/77A GB1537962A (en) 1976-12-27 1977-07-28 Vehicle system monitor
CA286,502A CA1101511A (en) 1976-12-27 1977-09-12 Vehicle system monitor
FR7730280A FR2375072A1 (fr) 1976-12-27 1977-10-07 Installation de surveillance perfectionnee pour un vehicule automobile
BE182892A BE861151A (fr) 1976-12-27 1977-11-24 Installation de surveillance perfectionnee pour un vehicule automobile
JP14336477A JPS5383236A (en) 1976-12-27 1977-12-01 Monitoring system for vehicle
BR7708606A BR7708606A (pt) 1976-12-27 1977-12-23 Sistema monitor para veiculo motorizado
JP59155716A JPS6064047A (ja) 1976-12-27 1984-07-27 車輌用監視システム

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/754,816 US4053868A (en) 1976-12-27 1976-12-27 Vehicle system monitor

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US4053868A true US4053868A (en) 1977-10-11

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US05/754,816 Expired - Lifetime US4053868A (en) 1976-12-27 1976-12-27 Vehicle system monitor

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US (1) US4053868A (ja)
JP (2) JPS5383236A (ja)
BE (1) BE861151A (ja)
BR (1) BR7708606A (ja)
CA (1) CA1101511A (ja)
FR (1) FR2375072A1 (ja)
GB (1) GB1537962A (ja)

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140996A (en) * 1977-06-29 1979-02-20 Realcom, Ltd. Function monitoring system
US4159531A (en) * 1977-11-21 1979-06-26 Mcgrath Joseph G Programmable read-only memory system for indicating service maintenance points for motor vehicles
US4184146A (en) * 1977-04-28 1980-01-15 Caterpillar Tractor Co. Warning system
US4222031A (en) * 1978-10-02 1980-09-09 Kabushiki Kaisha Komatsu Seisakusho Warning device for a vehicle
US4231025A (en) * 1979-11-01 1980-10-28 Metritape, Inc. Level and temperature readout and alarm system
FR2455771A1 (fr) * 1979-05-04 1980-11-28 Bosch Gmbh Robert Calculateur de donnees de conduite pour vehicules
US4321579A (en) * 1978-01-18 1982-03-23 Bayerische Motoren Werke Aktiengesellschaft Circuit arrangement for monitoring operating functions in motor vehicles
US4443784A (en) * 1979-06-28 1984-04-17 Siemens Aktiengesellschaft Fault detection in electronic vehicle controls
FR2535089A1 (fr) * 1982-10-26 1984-04-27 Mecanismos Aux Ind Centrale unifiee de temps pour automobiles
WO1984002787A1 (en) * 1983-01-05 1984-07-19 Towmotor Corp Diagnostic display apparatus
FR2579801A1 (fr) * 1985-04-02 1986-10-03 Bosch Gmbh Robert Procede pour la transmission en serie de codes de defauts et montage pour la mise en oeuvre de ce procede
US4644334A (en) * 1981-09-25 1987-02-17 Kabushiki Kaisha Komatsu Seisakusho Monitoring apparatus for a construction machine
EP0231155A1 (en) * 1986-01-23 1987-08-05 IVECO FIAT S.p.A. Processing system for the detection, control and diagnostic examination of the operating conditions of the internal combustion engine of a motor vehicle, particularly a commercial motor vehicle
US4697173A (en) * 1984-04-10 1987-09-29 Stokes Dale R Load sensing alarm condition monitor
US4727353A (en) * 1987-01-21 1988-02-23 Deere & Company Monitor display system
EP0268684A1 (en) * 1986-04-21 1988-06-01 Kabushiki Kaisha Komatsu Seisakusho Monitoring system for maintenance of car
US4841159A (en) * 1986-08-29 1989-06-20 Peabody Coal Company Switching and testing system
US4851822A (en) * 1986-01-27 1989-07-25 Frank P. Moss, Jr. Electronic monitoring system
US4862393A (en) * 1988-01-12 1989-08-29 Cummins Engine Company, Inc. Oil change interval monitor
US4887068A (en) * 1985-09-30 1989-12-12 Suzuki Jidosha Kogyo Kabushiki Kaisha Display control apparatus for use in internal combustion engine
US4890088A (en) * 1988-02-16 1989-12-26 Arthur Woodell Engine monitoring and control apparatus
US4926331A (en) * 1986-02-25 1990-05-15 Navistar International Transportation Corp. Truck operation monitoring system
US5039940A (en) * 1990-04-24 1991-08-13 Aeg Westinghouse Transportation Systems, Inc. Connector for verifying sequence of transit car controls
US5055825A (en) * 1989-09-06 1991-10-08 Hanil Industrial Co., Ltd. Method and circuit for self-checking troubles of a heating system
US5272464A (en) * 1990-04-23 1993-12-21 Jorgensen Adam A Centralized automotive resource management system
US5369392A (en) * 1992-09-16 1994-11-29 Caterpillar Inc. Method and apparatus for indicating faults in switch-type inputs
US5371487A (en) * 1992-09-16 1994-12-06 Caterpillar Inc. Method and apparatus for indicating a changed condition
US5425431A (en) * 1994-02-18 1995-06-20 Clark Equipment Company Interlock control system for power machine
US5453939A (en) * 1992-09-16 1995-09-26 Caterpillar Inc. Computerized diagnostic and monitoring system
US6030314A (en) * 1998-09-28 2000-02-29 Caterpillar Inc. Method and apparatus for retarding a work machine having a fluid-cooled brake system
EP0987138A2 (de) * 1998-09-16 2000-03-22 Mannesmann VDO Aktiengesellschaft Vorrichtung und Verfahren zum Anzeigen von Piktogrammen in einem Fahrzeug
US6087929A (en) * 1996-05-31 2000-07-11 Daimlerchrysler Ag Indication device
US6189646B1 (en) 1998-11-30 2001-02-20 Clark Equipment Company Traction lock/momentary override
US6289332B2 (en) 1999-02-26 2001-09-11 Freightliner Corporation Integrated message display system for a vehicle
US6496109B1 (en) * 2000-11-14 2002-12-17 Edward Guzick, Jr. Alternator-charging system fault detector
US6792797B2 (en) * 2001-10-12 2004-09-21 Honda Giken Kogyo Kabushiki Kaisha Engine malfunction detection system
US6809659B2 (en) * 2000-05-17 2004-10-26 Omega Patents, L.L.C. Vehicle tracker with test features and related methods
EP1524628A2 (de) * 2003-10-16 2005-04-20 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Überwachung von Vorgängen im Kraftfahrzeug
US20110093157A1 (en) * 2009-10-20 2011-04-21 General Electric Company, A New York Corporation System and method for selecting a maintenance operation
US7946912B1 (en) * 2006-05-01 2011-05-24 Carl J Rennard Roulette system
CN102808732A (zh) * 2011-05-31 2012-12-05 通用电气公司 监测风力涡轮机齿轮箱的油的状态的方法
KR20160051802A (ko) * 2013-09-06 2016-05-11 푸츠마이스터 엔지니어링 게엠베하 작업 장치 및 작업 장치를 작동시키기 위한 방법
JP2017141556A (ja) * 2016-02-08 2017-08-17 株式会社日立建機ティエラ 建設機械
US10731796B2 (en) * 2016-09-12 2020-08-04 Bayerische Motoren Werke Aktiengesellschaft Ascertaining the starting capability of a vehicle

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DE3104196C2 (de) * 1981-02-06 1988-07-28 Bayerische Motoren Werke AG, 8000 München Anzeigevorrichtung für Kraftfahrzeuge
DE3104174C2 (de) * 1981-02-06 1983-09-01 Bayerische Motoren Werke AG, 8000 München Anzeigevorrichtung für Kraftfahrzeuge
FR2552039A1 (fr) * 1983-09-15 1985-03-22 Veglia Ed Dispositif de transmission a un tableau de bord d'informations sur l'etat d'une pluralite de contacts electriques
JPS62187936U (ja) * 1986-05-21 1987-11-30
JPH0445513U (ja) * 1990-08-17 1992-04-17
JPH075971U (ja) * 1993-06-25 1995-01-27 日野自動車工業株式会社 大型バス用過熱警報装置
JP3674785B2 (ja) * 2002-11-25 2005-07-20 オムロン株式会社 警報システムおよび電源供給装置
JP7218121B2 (ja) * 2018-08-03 2023-02-06 株式会社小松製作所 作業車両

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US3949356A (en) * 1973-05-14 1976-04-06 Caterpillar Tractor Co. Vehicle systems monitor discriminating between emergency conditions and deferrable maintenance needs
US3864578A (en) * 1973-12-26 1975-02-04 Texas Instruments Inc Multiplex system for a vehicle
US4001776A (en) * 1975-08-04 1977-01-04 General Motors Corporation Multiple indication display

Cited By (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184146A (en) * 1977-04-28 1980-01-15 Caterpillar Tractor Co. Warning system
US4140996A (en) * 1977-06-29 1979-02-20 Realcom, Ltd. Function monitoring system
US4159531A (en) * 1977-11-21 1979-06-26 Mcgrath Joseph G Programmable read-only memory system for indicating service maintenance points for motor vehicles
US4321579A (en) * 1978-01-18 1982-03-23 Bayerische Motoren Werke Aktiengesellschaft Circuit arrangement for monitoring operating functions in motor vehicles
US4222031A (en) * 1978-10-02 1980-09-09 Kabushiki Kaisha Komatsu Seisakusho Warning device for a vehicle
FR2455771A1 (fr) * 1979-05-04 1980-11-28 Bosch Gmbh Robert Calculateur de donnees de conduite pour vehicules
US4443784A (en) * 1979-06-28 1984-04-17 Siemens Aktiengesellschaft Fault detection in electronic vehicle controls
US4231025A (en) * 1979-11-01 1980-10-28 Metritape, Inc. Level and temperature readout and alarm system
US4644334A (en) * 1981-09-25 1987-02-17 Kabushiki Kaisha Komatsu Seisakusho Monitoring apparatus for a construction machine
FR2535089A1 (fr) * 1982-10-26 1984-04-27 Mecanismos Aux Ind Centrale unifiee de temps pour automobiles
WO1984002787A1 (en) * 1983-01-05 1984-07-19 Towmotor Corp Diagnostic display apparatus
US4697173A (en) * 1984-04-10 1987-09-29 Stokes Dale R Load sensing alarm condition monitor
FR2579801A1 (fr) * 1985-04-02 1986-10-03 Bosch Gmbh Robert Procede pour la transmission en serie de codes de defauts et montage pour la mise en oeuvre de ce procede
US4739309A (en) * 1985-04-02 1988-04-19 Robert Bosch Gmbh Method and system for indicating and display information in response to electrical signals
US4887068A (en) * 1985-09-30 1989-12-12 Suzuki Jidosha Kogyo Kabushiki Kaisha Display control apparatus for use in internal combustion engine
EP0231155A1 (en) * 1986-01-23 1987-08-05 IVECO FIAT S.p.A. Processing system for the detection, control and diagnostic examination of the operating conditions of the internal combustion engine of a motor vehicle, particularly a commercial motor vehicle
US4851822A (en) * 1986-01-27 1989-07-25 Frank P. Moss, Jr. Electronic monitoring system
US4926331A (en) * 1986-02-25 1990-05-15 Navistar International Transportation Corp. Truck operation monitoring system
EP0268684A1 (en) * 1986-04-21 1988-06-01 Kabushiki Kaisha Komatsu Seisakusho Monitoring system for maintenance of car
EP0268684A4 (en) * 1986-04-21 1988-09-28 Komatsu Mfg Co Ltd SYSTEM TO MONITOR THE MAINTENANCE OF A CAR.
US4841159A (en) * 1986-08-29 1989-06-20 Peabody Coal Company Switching and testing system
US4727353A (en) * 1987-01-21 1988-02-23 Deere & Company Monitor display system
US4862393A (en) * 1988-01-12 1989-08-29 Cummins Engine Company, Inc. Oil change interval monitor
US4890088A (en) * 1988-02-16 1989-12-26 Arthur Woodell Engine monitoring and control apparatus
US5055825A (en) * 1989-09-06 1991-10-08 Hanil Industrial Co., Ltd. Method and circuit for self-checking troubles of a heating system
US5272464A (en) * 1990-04-23 1993-12-21 Jorgensen Adam A Centralized automotive resource management system
US5039940A (en) * 1990-04-24 1991-08-13 Aeg Westinghouse Transportation Systems, Inc. Connector for verifying sequence of transit car controls
US5369392A (en) * 1992-09-16 1994-11-29 Caterpillar Inc. Method and apparatus for indicating faults in switch-type inputs
US5371487A (en) * 1992-09-16 1994-12-06 Caterpillar Inc. Method and apparatus for indicating a changed condition
US5453939A (en) * 1992-09-16 1995-09-26 Caterpillar Inc. Computerized diagnostic and monitoring system
US5425431A (en) * 1994-02-18 1995-06-20 Clark Equipment Company Interlock control system for power machine
US6087929A (en) * 1996-05-31 2000-07-11 Daimlerchrysler Ag Indication device
EP0987138A2 (de) * 1998-09-16 2000-03-22 Mannesmann VDO Aktiengesellschaft Vorrichtung und Verfahren zum Anzeigen von Piktogrammen in einem Fahrzeug
EP0987138A3 (de) * 1998-09-16 2001-09-26 Mannesmann VDO Aktiengesellschaft Vorrichtung und Verfahren zum Anzeigen von Piktogrammen in einem Fahrzeug
US6030314A (en) * 1998-09-28 2000-02-29 Caterpillar Inc. Method and apparatus for retarding a work machine having a fluid-cooled brake system
US6189646B1 (en) 1998-11-30 2001-02-20 Clark Equipment Company Traction lock/momentary override
US6289332B2 (en) 1999-02-26 2001-09-11 Freightliner Corporation Integrated message display system for a vehicle
US6809659B2 (en) * 2000-05-17 2004-10-26 Omega Patents, L.L.C. Vehicle tracker with test features and related methods
US6496109B1 (en) * 2000-11-14 2002-12-17 Edward Guzick, Jr. Alternator-charging system fault detector
US6792797B2 (en) * 2001-10-12 2004-09-21 Honda Giken Kogyo Kabushiki Kaisha Engine malfunction detection system
EP1524628A2 (de) * 2003-10-16 2005-04-20 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Überwachung von Vorgängen im Kraftfahrzeug
DE10348108A1 (de) * 2003-10-16 2005-05-19 Bayerische Motoren Werke Ag Verfahren zur Überwachung von Vorgängen im Kraftfahrzeug
EP1524628A3 (de) * 2003-10-16 2006-02-08 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Überwachung von Vorgängen im Kraftfahrzeug
US7946912B1 (en) * 2006-05-01 2011-05-24 Carl J Rennard Roulette system
US20110093157A1 (en) * 2009-10-20 2011-04-21 General Electric Company, A New York Corporation System and method for selecting a maintenance operation
WO2011049667A1 (en) * 2009-10-20 2011-04-28 General Electric Company System and method for selecting a maintenance operation
CN102808732A (zh) * 2011-05-31 2012-12-05 通用电气公司 监测风力涡轮机齿轮箱的油的状态的方法
EP2530367A1 (en) * 2011-05-31 2012-12-05 General Electric Company System and methods for monitoring oil conditions of a wind turbine gearbox
KR20160051802A (ko) * 2013-09-06 2016-05-11 푸츠마이스터 엔지니어링 게엠베하 작업 장치 및 작업 장치를 작동시키기 위한 방법
US20160185359A1 (en) * 2013-09-06 2016-06-30 Putzmeister Engineering Gmbh Working machine and method for operating said working machine
US10286920B2 (en) * 2013-09-06 2019-05-14 Putzmeister Engineering Gmbh Working machine and method for operating said working machine
JP2017141556A (ja) * 2016-02-08 2017-08-17 株式会社日立建機ティエラ 建設機械
US10731796B2 (en) * 2016-09-12 2020-08-04 Bayerische Motoren Werke Aktiengesellschaft Ascertaining the starting capability of a vehicle

Also Published As

Publication number Publication date
GB1537962A (en) 1979-01-10
FR2375072A1 (fr) 1978-07-21
FR2375072B1 (ja) 1982-05-21
JPS5383236A (en) 1978-07-22
JPS625814B2 (ja) 1987-02-06
BE861151A (fr) 1978-05-24
CA1101511A (en) 1981-05-19
JPS6064047A (ja) 1985-04-12
JPS625813B2 (ja) 1987-02-06
BR7708606A (pt) 1978-08-22

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